elongatus, Luciogobius Regan [C. T.] 1905:23 [Annals and Magazine of Natural History (Series 7) v. 15 (no. 85) (art. 2); ref. 3624] Inland Sea, Japan. Lectotype: BMNH 1905.6.6.445. Paralectotypes: BMNH 1905.6.6.446-453 (8), 1905.6.6.454 (1). Lectotype designation not researched, not designated here. •Synonym of Luciogobius guttatus Gill 1859 -- (Berg 1949:1124 [ref. 20662]). •Synonym of Luciogobius guttatus Gill 1859, form elongatus -- (Kuroda 1953:277 [ref. 39545]). •Synonym of Luciogobius guttatus Gill 1859, subspecies guttatus -- (Okada 1961:686 [ref. 6363]). •Valid as Luciogobius elongatus Regan 1905 -- (Lindberg & Krasyukova 1975:404 [ref. 7348], Sheiko 1983:18 [ref. 37041], Akihito in Masuda et al. 1984:282 [ref. 6441], Nakabo 2000:1164 [ref. 25182], Okiyama 2001:146 [ref. 25683], Nakabo 2002:1164 [ref. 26193], Hagiwara 2003:38 [ref. 27188], Vasil'eva 2003:S48 [ref. 28444], Chen et al. 2008:253 [ref. 30075], Kanagawa et al. 2011:67 [ref. 31329], Matsui et al. 2014:4 [ref. 33344], Parin et al. 2014:490 [ref. 33547], Shibukawa et al. 2019:74 [ref. 36663], Dyldin et al. 2020:93 [ref. 37569], Koreeda & Motomura 2021:42 [ref. 38646], Parenti 2021:291 [ref. 38603], Koreeda & Motomura 2022:146 [ref. 39272], Koreeda et al. 2023:9 [ref. 40925], Abe et al. 2024:9 [ref. 41435], Chen & Liao 2024:251 [ref. 41300]). Current status: Valid as Luciogobius elongatus Regan 1905. Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Japan and ?Russia. Habitat: marine.